/**
 * Copyright 2010 Tristan Slominski
 *
 * Licensed under the MIT License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.opensource.org/licenses/mit-license.php
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.mindash.handlebars.client.services;

import com.google.gwt.event.shared.EventHandler;
import com.google.gwt.event.shared.GwtEvent;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.event.shared.GwtEvent.Type;

/**
 * EventBus for use by the application. Copied directly from
 * {@code net.customerware.gwt.presenter.client.EventBus}
 * 
 * @author Tristan Slominski
 */
public interface EventBus {
  
  <H extends EventHandler> HandlerRegistration addHandler(Type<H> type,
      H handler);

  void fireEvent(GwtEvent<?> event);

  <H extends EventHandler> H getHandler(Type<H> type, int index);

  int getHandlerCount(Type<?> type);

  boolean isEventHandled(Type<?> e);

}
